Polarizable nanoparticles and electrorheological fluid comprising same
AssigneeBaker Hughes Incorporated
InventorsTerry R. Bussear, Soma Chakraborty, Michael H. Johnson
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Abstract
An electrorheological fluid comprises a nanoparticle composition comprising a nanoparticle, uncoated or coated with a polymeric or metallic coating and covalently bonded to or coated on a surface of a polymeric or inorganic particle; and a dielectric fluid having a dielectric constant lower than that of the nanoparticle composition. A nanoparticle composition also comprises a carbon-based nanoparticle, covalently bonded to or coated on a surface of a conjugated polymer particle or inorganic particle, wherein the nanoparticle composition is a dielectric material.
Claims13
An electrorheological fluid, comprising:
- a nanoparticle composition comprising:
- a derivatized nanoparticle covalently bonded to or coated on
- a surface of a polymeric or inorganic particle;
- and
- a dielectric fluid having a dielectric constant lower than that of the nanoparticle composition,
- wherein the derivatized nanoparticle comprises a nanoparticle and a functional group covalently bonded to the nanoparticle, the functional group comprising carboxy, epoxy, ether, ketone, amine, hydroxy, alkoxy, alkyl, aryl, aralkyl, alkaryl, lactone, functionalized polymeric or oligomeric groups, or a combination comprising at least one of the forgoing functional groups, and
- wherein the derivatized nanoparticle is further coated with a polymeric or metallic coating before covalently bonded to or coated on a surface of the polymeric or inorganic particle.
An electrorheological fluid, comprising:
- a nanoparticle composition comprising:
- a nanoparticle covalently bonded to or coated on
- a surface of an inorganic particle;
- and
- a dielectric fluid having a dielectric constant lower than that of the nanoparticle composition,
- wherein the inorganic particle comprises a ceramic, a metal oxide, a metal, or a composite comprising at least one of the foregoing;
- and
- wherein the nanoparticle is further coated with a polymeric or metallic coating before covalently bonded to or coated on a surface of an inorganic particle.
Dependencies are inferred from the claim text.